How to Bypass or Remove a BIOS PasswordA BIOS password is a protection measure that can be used to stop someone powering up acomputer system or making changes in some of the computers most sensitive areas. Manybig name computer manufacturers such as Dell and HP lock the customers out of this areabecause they don’t want the customer changing anything and potentially damaging themachine (which the manufacturer may have to warranty). However, when someone like acomputer technician or hardware enthusiast needs to make some hardware changes to thecomputer, they will need to access the BIOS. Here are some methods to bypass or removea BIOS password.NOTE: Do not try to guess the password on a passworded Hard Drive. 3 wrong guesses willoften result in the information on the hard drive being lost forever.How to Bypass or Remove a BIOS Password by Removing the CMOS Battery:The simplest way to remove a BIOS password is to simply remove the CMOS battery. Acomputer will remember its settings and keep the time even when it is turned off andunplugged because these parts are powered by small battery inside the computer called aCMOS battery. If we pull out this battery, the computer will forget alot of its hardwaresettings, including its BIOS password. This should not be performed on Laptops if you arenot experienced working with laptop hardware.Anyway, open up the computer case using a screw driver and locate theflat, circular and metallic CMOS battery. It should look something likethe picture to the right. Some computers have this part standing upright.Once you have located it, observe how the latches are holding it. Thereare many different ways to remove a CMOS battery but the most common way on newercomputers can be seen in the picture below.Make sure to power down the computer, unplug the power cables andunplug any USB devices if they are powered. The computer must not beable to get power from anywhere for this to work. Take out the CMOSbattery and wait 10 – 25 minutes before putting it back in. The reasonfor this wait is because the computer can still store power in its capacitors even thougheverything is unplugged. The waiting period allows enough time for them to discharge.Plug everything back in, power up the computer and enter the BIOS again. If everythingwent well there should be no more password. In some cases, if you get weird errormessages during bootup now, you will need to goto “Load BIOS Defaults” in BIOS and savethe changes to fix them.If this method didn’t work, try one of the methods below.
How to Bypass or Remove a BIOS Password using Software:!BIOS is a freeware utility which is designed to be a whole BIOS and security suite. It hasthe ability to decrypt the passwords used in some of the most common BIOS makes such asAward, Phoenix, American Megatrends, IMB etc..It also has the ability to brute force the password (known as “blasters”). However, thismethod is dangerous and can result in some unexpected and unwanted results.Note: Because of this applications password cracking abilities, some antivirus software mayreport it as a virus/trojan. This is a false positive.To start using !BIOS, reboot your computer and take note of the BIOS type and version youare running. For example, If your motherboard uses Award BIOS you should look for thetext “Award Medallion BIOS 6.0″ or something similar.Download !BIOS from here and save it to your desktop. Then, open a DOS commandwindows by going to Start > Run and type: cmdOnce you see a black screen in front of you, type: cd desktopYou should now see something like: C:Documents and SettingsYourUserNameDesktop>Now type the name of the file you just downloaded, if you haven’t changed the name justtype in: bios320.exeUse the down arrow and choose “Crackers” and then press the rightarrow. Using the up and down arrows, select the BIOS that themotherboard is using and press Enter.You should now see a menu asking what you want to crack, in most cases its the Supervisoror System Passwords you want to crack, so press the 1 key on your keyboard. It will thenshow you another menu asking how you want it to be cracked. Option 1 is pretty good sotry that first by pressing the 1 key on your keyboard. You should now have your BIOSpassword.Reboot the computer, enter the BIOS and try it out.How to Bypass or Remove a BIOS Password using the manufacturer backdoorpassword:On many computers (especially old ones), computer manufacturers build in backdoorpasswords for their own technicians to use so they can access the BIOS when the hardwareis being serviced. Here are some of the ones that have been reported. You may need to tryquite a few passwords before you find one that worksThese passwords are CaSe SeNsItIve.